In one example he shows us

Consequently, the Fifa 16 coins buy  has sought to make players feel more responsive while defending. One result is the new swing step move where defenders are able to quickly switch direction while running back toward their own goal in front of an attacking player.

This apparently stops the player from over-running and creating gaps for the opponent to accelerate through.Channon says the AI defenders have also been tweaked so they work more as a unit.

In one example he shows us, Real Madrid is just building an attack with Modric on the ball, so the right back is looking to Fifa 16 coins buy run up the field. However, when the Croatian midfielder loses possession our defender immediately starts running back into position.

http://www.fifaeasy.com/